"""

        Renames a group on filesystem

        :param group_name:

        """

        if old == new:

            log.debug('skipping group rename')

            return

        log.debug('renaming repository group from %s to %s' % (old, new))

        old_path = os.path.join(self.repos_path, old)

        new_path = os.path.join(self.repos_path, new)

        log.debug('renaming repos paths from %s to %s' % (old_path, new_path))

        if os.path.isdir(new_path):

            raise Exception('Was trying to rename to already '

                            'existing dir %s' % new_path)

        shutil.move(old_path, new_path)

    def __delete_group(self, group, force_delete=False):

        """

        Deletes a group from a filesystem

        :param group: instance of group from database

        :param force_delete: use shutil rmtree to remove all objects

        """

        paths = group.full_path.split(RepoGroup.url_sep())

        paths = os.sep.join(paths)

        rm_path = os.path.join(self.repos_path, paths)

        log.info("Removing group %s" % (rm_path))

        # delete only if that path really exists

        if os.path.isdir(rm_path):

            if force_delete:

                shutil.rmtree(rm_path)

            else:

                #archive that group`

                _now = datetime.datetime.now()

                _ms = str(_now.microsecond).rjust(6, '0')

                _d = 'rm__%s_GROUP_%s' % (_now.strftime('%Y%m%d_%H%M%S_' + _ms),

                                          group.name)

                shutil.move(rm_path, os.path.join(self.repos_path, _d))

    def create(self, group_name, group_description, owner, parent=None, just_db=False):

        try:

            new_repos_group = RepoGroup()

            new_repos_group.group_description = group_description or group_name

            new_repos_group.parent_group = self._get_repo_group(parent)

            new_repos_group.group_name = new_repos_group.get_new_name(group_name)

            self.sa.add(new_repos_group)

            perm_obj = self._create_default_perms(new_repos_group)

            self.sa.add(perm_obj)

            self.grant_user_permission(repos_group=new_repos_group,

                                       user=owner, perm='group.admin')

            if not just_db:

                # we need to flush here, in order to check if database won't

                # throw any exceptions, create filesystem dirs at the very end

                self.sa.flush()

                self.__create_group(new_repos_group.group_name)

            return new_repos_group

        except Exception:

            log.error(traceback.format_exc())

            raise

    def _update_permissions(self, repos_group, perms_new=None,

                            perms_updates=None, recursive=False,

                            check_perms=True):

        from rhodecode.model.repo import RepoModel

        from rhodecode.lib.auth import HasUserGroupPermissionAny

        if not perms_new:

            perms_new = []

        if not perms_updates:

            perms_updates = []

        def _set_perm_user(obj, user, perm):

            if isinstance(obj, RepoGroup):

                self.grant_user_permission(

                    repos_group=obj, user=user, perm=perm

                )

            elif isinstance(obj, Repository):

                #we do this ONLY IF repository is non-private

                if obj.private:

                    return

                # we set group permission but we have to switch to repo

                # permission

                perm = perm.replace('group.', 'repository.')

                RepoModel().grant_user_permission(

                    repo=obj, user=user, perm=perm

                )

        def _set_perm_group(obj, users_group, perm):

            if isinstance(obj, RepoGroup):

                self.grant_users_group_permission(

                    repos_group=obj, group_name=users_group, perm=perm

                )

            elif isinstance(obj, Repository):